APA
National Academy of Sciences Naitonal Research Council (USA), National Academy of Sciences Naitonal Research Council (USA), . (1972). Earth and human affairs. New York: Harper & Row USA.
Chicago
National Academy of Sciences Naitonal Research Council (USA), National Academy of Sciences Naitonal Research Council (USA), . 1972. Earth and human affairs. New York: Harper & Row USA.
Harvard
National Academy of Sciences Naitonal Research Council (USA), National Academy of Sciences Naitonal Research Council (USA), . (1972). Earth and human affairs. New York: Harper & Row USA.
MLA
National Academy of Sciences Naitonal Research Council (USA), National Academy of Sciences Naitonal Research Council (USA), . Earth and human affairs. New York: Harper & Row USA. 1972.